基于分布式光纤测温的高拱坝蓄水初期实测温度场分析

Analysis of Measured Temperature Field during Initial Impoundment Period of High Arch Dam Based on Distributed Optical Fiber Temperature Monitoring

蓄水初期坝体内部实际温度分布状态对高拱坝的安全运行具有重要意义,基于分布式光纤测温原理,运用sufer8.0绘图软件绘制各蓄水阶段的拱冠梁坝段实测温度等值线图,根据温度等值图可直观分析坝体内的温度场分布状态,并结合西南某高拱坝施工期及蓄水初期光纤实测温度资料,判断得出该高拱坝坝体温度场分布大致合理,温度控制措施合理有效。由此表明,基于分布式光纤测温方法简单、结果可靠,可满足实际现场运行监测需要。

The actual water temperature distribution status inside the initial impoundment dam body is of great significance to the safe operation of the high arch dam.Based on the principle of distributed optical fiber temperature measurement,the mapping software sufer8.0was used to plot the measured temperature contour map in the crown cantilever dam section of each impoundment stage.According to the contour map,it can intuitively analyze the dam body temperature field distribution status.Combined with the analysis of fiber-measured temperature data during the construction and initial impoundment period of a dam in Southwest China,it draws the following conclusions that the high arch dam temperature field distribution is roughly reasonable and the temperature control measures are effective.Therefore,the proposed method is simple and the result is reliable,which can meet the needs of the actual field operation monitoring.